RT-PCR testing is the standard testing method used to confirm an individuals’ current infection status. It is highly accurate and can detect very low levels of infection, being most effective in the first 21 days after initial exposure when virus levels are at their peak.

RT-PCR tests are the same tests used by Government testing centres – with which we are all familiar. The test involves using a swab to collect mucus from the back of the throat and the inner nostril. The swab is then sealed in a sterile container and sent to a laboratory to verify the presence, or lack of, the virus’ genetic material.

Laboratory technicians use Polymerase Chain Reaction (PCR) technologies to detect viral DNA in the sample and then extract, amplify and identify the genetic RNA material of the virus. This rather complex procedure and the delay incurred by sending the samples to the laboratory, make it far less practical than Lateral Flow (AntiGen) testing as a screening method. However, RT-PCR testing should always be used to confirm any ‘positive’ rapid test results for absolute confirmation of the presence of the virus.

We can carry this test out for you or, as RT-PCR swab collection does not require medical supervision, this test can be carried out by the individual themselves either at home or on your premises to send by post to the laboratory.

PCR testing cannot determine the level of infection (it will only give a ‘yes-or-no’ answer as to whether the virus’ DNA is present in the sample or not); nor can it detect whether an individual has been infected in the past. After 21 days, PCR testing is less effective because developing antibodies start to fight the virus and eliminate it from the body – testing for a prior Covid-19 infection would require a Covid-19 Antibody Test.

NB: Recent administration of the Covid-19 vaccination will not cause a positive test result.